Negative pressure suction module, water tank and cleaning base station

Abstract

The utility model discloses a negative pressure suction module, a water tank and a cleaning base station. The negative pressure suction module comprises an installation part, an air exhaust column, a dirt suction column and a floating part. The mounting part is used for mounting the negative pressure suction module to the bottom of the water tank; the air exhaust column is arranged on the mounting part and is used for communicating the interior of the water tank with the air source part; the dirt suction column is arranged on the mounting part and is used for communicating the interior of the water tank with a space in which liquid to be sucked is located; the floating piece can change along with the water level in the water tank and can block the air exhaust column. The negative pressure suction module is applied to the water tank and the cleaning base station, and the negative pressure suction module which can be integrally detached is arranged, so that the cleaning difficulty of the water tank is effectively reduced; the water level in the water tank is monitored through the floating piece, and water fullness alarm is sensitive and reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to cleaning equipment technical field, especially negative pressure suction module, water tank and cleaning base station. BACKGROUND

[0002] Cleaning equipment such as ground cleaning equipment is mechanical equipment designed for cleaning ground, and common ground cleaning equipment such as scrubber usually includes sewage tank, and the sewage tank is mainly used for recycling sewage generated in the cleaning process of cleaning equipment.

[0003] In the prior art, the sewage tank is usually provided with a full water detection structure and a sewage suction structure, so that the internal structure of the sewage tank is relatively complex, and various structures in the sewage tank are usually fixedly arranged in the sewage tank, when cleaning the sewage tank, the cleaning of various structures is often not in place, and long-term use can cause odor in the sewage tank, and the user experience is poor.

[0004] Therefore, the utility model aims at providing a new technical scheme to solve the existing technical problems. UTILITY MODEL CONTENT

[0005] In order to overcome the defects of the prior art, the utility model provides negative pressure suction module, water tank and cleaning base station, which solve the problem of difficult cleaning of the water tank in the prior art.

[0006] The utility model solves the technical problems by adopting the following technical scheme:

[0007] A negative pressure suction module, comprising a mounting piece, an air suction column, a sewage suction column and a floating piece, the mounting piece is used for mounting the negative pressure suction module to the bottom of the water tank, the air suction column is arranged on the mounting piece and is used for connecting the inside of the water tank and an air source piece, the sewage suction column is arranged on the mounting piece and is used for connecting the inside of the water tank and a space where a liquid to be sucked is located, and the floating piece can change with the water level in the inside of the water tank and can block the air suction column.

[0008] In the above structure, the negative pressure suction module further comprises a positioning column, the positioning column is arranged on the mounting piece, the air suction column is connected with the positioning column, a gas permeation gap is formed in the side wall of the positioning column, and the floating piece is arranged in the positioning column.

[0009] In the above structure, the top end of the air suction column is provided with a connecting pipe, the connecting pipe is connected with a connecting head, the connecting head is arranged on the top end of the positioning column, and a gas permeation hole is formed in the connecting head and is connected with the connecting pipe.

[0010] The floating piece changes with the water level in the inside of the water tank and can block the gas permeation hole.

[0011] In the above structure, the mounting piece is further provided with a limiting column, the sewage suction column is connected with a sewage discharge pipe, the sewage discharge pipe is connected with a one-way valve, the one-way valve is communicated with the limiting column, and the limiting column is provided with a downward water drainage gap.

[0012] Based on the negative pressure suction module with the above structure, the utility model further provides:

[0013] A water tank is characterized by comprising the negative pressure suction module with the above structure, and further comprising a water tank body, wherein the bottom of the water tank body is provided with a mounting hole, and the mounting hole is matched with the mounting piece to detachably fix the negative pressure suction module on the water tank body.

[0014] In the above structure, the water tank body is provided with a connecting part which is protruded from the mounting hole, the mounting piece comprises a bottom plate and a threaded sleeve, the threaded sleeve is sleeved on the bottom plate, the air suction column, the sewage suction column and the positioning column are arranged on the bottom plate, the bottom plate is provided with a sewage suction hole and an air suction hole, the air suction column is communicated with the air suction hole, the sewage suction column is communicated with the sewage suction hole, and the threaded sleeve is threadedly connected with the connecting part.

[0015] In the above structure, the bottom plate is provided with a flange which is clamped in the mounting hole, the inner side of the connecting part is provided with a positioning convex rib, and the flange is provided with a positioning groove which is matched with the positioning convex rib.

[0016] Based on the water tank with the above structure, the utility model further provides:

[0017] A cleaning base station comprises the water tank with the above structure, and further comprises a base station body and a base, the water tank body is arranged on the base station body, the base station body is provided with an air suction pump, the air suction pump is connected with the air suction column, the base is provided with a cleaning tank, the sewage suction column is connected with the cleaning tank, the base station body is provided with an air pressure detection module which is electrically connected with the base station body and used for detecting air suction pressure.

[0018] In the above structure, the base station body is provided with a mounting seat for mounting the water tank, the mounting seat is provided with a mounting groove, the bottom of the mounting groove is provided with an air suction connector and a sewage suction connector, the mounting piece is mounted in the mounting groove, the air suction connector extends into the air suction hole and is communicated with the air suction hole, the sewage suction connector extends into the sewage suction hole, the air suction connector is connected with the air suction pump, and the sewage suction connector is connected with the cleaning tank.

[0019] In the structure, the mounting seat is provided with an air outlet joint, the air outlet joint is located in the mounting groove, the air outlet joint is connected with the air outlet end of the air pump, the mounting piece is provided with a clearance groove, and the air outlet joint can extend into the clearance groove.

[0020] The bottom groove wall of the mounting groove is provided with a drain hole connected to the cleaning groove.

[0021] The beneficial effect of the utility model is: the negative pressure suction module provided by the utility model is provided with a floating piece following water level change, when the water level rises to a predetermined value, the floating piece will block the air extraction column, so that the air source piece cannot extract air in the water tank, whether the water tank is full of water can be judged according to the air extraction air pressure; the independent negative pressure suction module is arranged in the water tank, the negative pressure air extraction module can be integrally detached from the water tank for cleaning, and the cleaning difficulty of the water tank is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] The utility model is further illustrated below in combination with the drawings and examples.

[0023] Figure 1 It is the water tank external structure schematic diagram of the utility model;

[0024] Figure 2 It is the water tank and negative pressure suction module split structure schematic diagram of the utility model;

[0025] Figure 3 It is the negative pressure suction module one side cross section schematic diagram of the utility model;

[0026] Figure 4 It is the negative pressure suction module other side cross section schematic diagram of the utility model;

[0027] Figure 5 It is the water tank one side cross section schematic diagram of the utility model;

[0028] Figure 6 It is the whole structure schematic diagram of the utility model;

[0029] Figure 7 It is the part structure split schematic diagram of the utility model;

[0030] Figure 8 It is the mounting seat structure schematic diagram of the utility model;

[0031] Figure 9 It is the base station main part internal structure schematic diagram of the utility model.

[0032] REFERENCE SIGNS:

[0033] 1, base station main body; 11, mounting seat; 111, mounting groove; 112, suction joint; 113, air extraction joint; 114, air outlet joint; 115, drain hole;

[0034] 2, negative pressure suction module; 2016, mounting piece; 21, bottom plate; 211, flange; 212, positioning groove; 213, air extraction hole; 214, suction hole; 215, accommodation groove; 22, air extraction column; 221, connecting pipe; 222, connecting head; 2221, air hole; 23, suction column; 231, drain pipe; 2311, one-way valve; 24, positioning column; 241, air hole; 25, limiting column; 251, drain hole; 26, threaded sleeve; 27, sealing ring;

[0035] 3, air pressure detection module; 31, floating piece; 32, soft glue; 33, air pressure sensor;

[0036] 4, base; 41, cleaning tank;

[0037] 5, water tank body; 51, mounting hole; 52, connecting part; 521, positioning convex rib;

[0038] 6, air extraction pump. DETAILED DESCRIPTION

[0039] The utility model discloses a negative pressure suction module 2, including mounting piece 2016, air extraction column 22, suction column 23 and floating piece 31, mounting piece 2016 is used to install negative pressure suction module 2 to water tank bottom, air extraction column 22 sets up on mounting piece 2016, is used to communicate water tank inside and gas source spare, suction column 23 sets up on mounting piece 2016, is used to connect water tank inside and the liquid space to be inhaled, and floating piece 31 can follow water tank inside water level change and can block air extraction column 22. Figures 1-9 The utility model discloses a negative pressure suction module 2, including mounting piece 2016, air extraction column 22, suction column 23 and floating piece 31, mounting piece 2016 is used to install negative pressure suction module 2 to water tank bottom, air extraction column 22 sets up on mounting piece 2016, is used to communicate water tank inside and gas source spare, suction column 23 sets up on mounting piece 2016, is used to connect water tank inside and the liquid space to be inhaled, and floating piece 31 can follow water tank inside water level change and can block air extraction column 22.

[0040] The utility model discloses a negative pressure suction module 2, including mounting piece 2016, air extraction column 22, suction column 23 and floating piece 31, mounting piece 2016 is used to install negative pressure suction module 2 to water tank bottom, air extraction column 22 sets up on mounting piece 2016, is used to communicate water tank inside and gas source spare, suction column 23 sets up on mounting piece 2016, is used to connect water tank inside and the liquid space to be inhaled, and floating piece 31 can follow water tank inside water level change and can block air extraction column 22.

[0041] Refer to Figures 1 to 5 The utility model discloses a negative pressure suction module 2, including mounting piece 2016, air extraction column 22, suction column 23 and floating piece 31, mounting piece 2016 is used to install negative pressure suction module 2 to water tank bottom, air extraction column 22 sets up on mounting piece 2016, is used to communicate water tank inside and gas source spare, suction column 23 sets up on mounting piece 2016, is used to connect water tank inside and the liquid space to be inhaled, and floating piece 31 can follow water tank inside water level change and can block air extraction column 22.

[0042] Further, the negative pressure suction module 2 further comprises a positioning column 24 arranged on the mounting piece 2016, the air suction column 22 is connected with the positioning column 24, the side wall of the positioning column 24 is provided with a ventilation gap 241, and the floating piece 31 is arranged in the positioning column 24.

[0043] Further, the top end of the air suction column 22 is provided with a connecting pipe 221, the connecting pipe 221 is connected with a connecting head 222, the connecting head 222 is arranged on the top end of the positioning column 24, and the connecting head 222 is provided with a ventilation hole 2221 in communication with the connecting pipe 221.

[0044] Wherein, the floating piece 31 floats with the water level in the water tank and can block the ventilation hole 2221.

[0045] Further, the mounting piece 2016 is further provided with a limiting column 25, the top end of the sewage suction column 23 is connected with a sewage discharge pipe 231, the sewage discharge pipe 231 is connected with a one-way valve 2311, the one-way valve 2311 is in communication with the limiting column 25, and the limiting column 25 is provided with a downward water discharge gap 251.

[0046] Based on the negative pressure air suction module with the above structure, the utility model further provides:

[0047] A water tank comprising the negative pressure suction module 2 with the above structure, further comprising a water tank body 5, the bottom of the water tank body 5 is provided with a mounting hole 51, and the mounting hole 51 is matched with the mounting piece 2016 so that the negative pressure suction module 2 can be detachably fixed on the water tank body 5.

[0048] Referring to Figures 1 to 5 , the negative pressure suction module 2 is detachably arranged and fixed on the water tank body 5, specifically, the mounting piece 2016 is matched with the mounting hole 51, so that the air suction column 22, the sewage suction column 23, the limiting column 25 and the positioning column 24 are located in the water tank body 5, one end of the air suction column 22 is connected to the air source piece, the other end is in communication with the internal space of the water tank, one end of the sewage suction column 23 is connected to the space where the liquid to be sucked is located, the other end is in communication with the internal space of the water tank body 5, the air source piece performs air suction on the water tank body 5 through the air suction column 22, so that negative pressure is formed in the water tank body 5, and the liquid to be sucked is sucked into the water tank body 5 from the sewage suction column 23.

[0049] Further, the air extraction column 22 is connected with the positioning column 24, the side wall of the positioning column 24 is provided with a gas permeable gap 241, specifically, the gas permeable gap 241 is provided from top to bottom, the positioning column 24 is connected with the inside of the water tank body 5 through the gas permeable gap 241, when the air source works, the gas in the water tank body 5 enters the positioning column 24 through the gas permeable gap 241, and then is discharged from the air extraction column 22, so that the negative pressure is formed in the water tank body 5. When the water tank body 5 is in a negative pressure state, the liquid to be sucked is sucked into the water tank body 5, and the water in the water tank body 5 can also enter the positioning column 24 from the gas permeable gap 241, so that the water level in the positioning column 24 is consistent with the water level in the water tank body 5, and then the floating piece 31 arranged in the positioning column 24 will float with the change of the water level.

[0050] The limiting column 25 is further arranged on the mounting piece 2016, the sewage suction column 23 is connected with a sewage discharge pipe 231, the sewage discharge pipe 231 is connected with a one-way valve 2311, the one-way valve 2311 is connected with the limiting column 25, and the limiting column 25 is provided with a water discharge gap 251 which is provided from top to bottom. In the embodiment, the sewage suction column 23 is connected with the limiting column 25, the sewage suction column 23 is connected with the sewage discharge pipe 231, the sewage discharge pipe 231 is connected with the one-way valve 2311, the one-way valve 2311 extends into the limiting column 25 and is connected with the limiting column 25, the limiting column 25 is provided with the water discharge gap 251 which is provided from top to bottom. The sewage in the cleaning tank 41 is discharged into the limiting column 25 from the one-way valve 2311 through the sewage suction column 23, and then is discharged into the water tank body 5 from the water discharge gap 251. The limiting column 25 limits the sewage discharge pipe 231, effectively ensures that the sewage discharge pipe 231 does not irregularly shake in the process of discharging sewage, and affects the sewage suction effect. The one-way valve 2311 is arranged at the sewage discharge pipe 231, which can avoid the possibility that the sewage in the water tank body 5 flows back to the cleaning tank 41 from the sewage suction column 23. In the embodiment, the limiting column 25 is also integrally formed with the bottom plate 21.

[0051] Further, the water tank body 5 is provided with a mounting hole 51, and the negative pressure suction module 2 extends into the inside of the water tank body 5 from the mounting hole 51. Specifically, the mounting piece 2016 includes the bottom plate 21 and a threaded sleeve 26, the sewage suction column 23, the air extraction column 22, the positioning column 24 and the limiting column 25 are arranged on the bottom plate 21. The bottom plate 21 is provided with a sewage extraction hole 214 and an air extraction hole 213, the sewage suction column 23 is arranged at the sewage extraction hole 214 and is connected with the sewage extraction hole 214, and the air extraction column 22 is arranged at the air extraction hole 213 and is connected with the air extraction hole 213. In addition, considering the air tightness of the connection of the negative pressure suction module 2, the bottom plate 21, the sewage suction column 23, the air extraction column 22 and the positioning column 24 are integrally formed.

[0052] The bottom of the water tank body 5 is provided with a connecting portion 52, and the threaded sleeve 26 is sleeved on the bottom plate 21 and is screwed on the connecting portion 52, so as to realize the connection and fixation between the negative pressure suction module 2 and the water tank body 5. In the embodiment, the connecting portion 52 is arranged at the mounting hole 51, and the connecting portion 52 protrudes from the bottom of the water tank body 5. When mounting, the negative pressure suction module 2 is inserted into the inside of the water tank body 5 from the mounting hole 51, and then the threaded sleeve 26 is screwed on the connecting portion 52, so as to realize the mounting and fixation of the negative pressure suction module 2.

[0053] Further, the bottom plate 21 and the water tank body 5 are provided with a sealing ring 27. Specifically, the bottom plate 21 is fixedly connected with the sealing ring 27 on the side facing the water tank body 5. The size and shape of the sealing ring 27 are matched with the size and shape of the end face of the connecting portion 52. When the threaded sleeve 26 is screwed on the connecting portion 52, the bottom plate 21 and the sealing ring 27 are tightly pressed against the connecting portion 52, so as to effectively ensure the sealing performance of the connecting portion 52 and reduce the possibility of leakage of sewage in the water tank body 5 from the connecting portion 52 during use.

[0054] Further, the bottom plate 21 is provided with a flange 211, which can be clamped with the mounting hole 51. The inner side of the connecting portion 52 is provided with a positioning convex rib 521, and the flange 211 is provided with a positioning recess 212 corresponding to the positioning convex rib 521. When mounting the negative pressure suction module 2, the positioning recess 212 is aligned with the positioning convex rib 521, and then the negative pressure suction module 2 is pushed into the water tank body 5, and the threaded sleeve 26 is screwed. The positioning convex rib 521 and the positioning recess 212 cooperate to position the installation of the negative pressure suction module 2, so that the negative pressure suction module 2 is installed in the water tank body 5 in a fixed installation direction.

[0055] The negative pressure suction module 2 is detachably connected to the water tank body 5, and the negative pressure suction module 2 can be completely detached from the water tank body 5 for cleaning, which effectively reduces the cleaning difficulty.

[0056] Reference Figures 3 to 9The utility model discloses a kind of cleaning base stations, including the water tank of structure as above, still including base station main body 1, base 4, base 4 is set to the below of base station main body 1, water tank is set to base station main body 1, water tank is detachably connected with base station main body 1, base station main body 1 still be provided with suction pump 6 in, and suction pump 6 is connected with base station main body 1 electric signal.

[0057] Referring to Figures 3 to 7 , negative pressure suction module 2 is communicated with cleaning tank 41 and water tank body 5, specifically, one end of suction column 22 is connected to suction pump 6, and the other end is communicated with the internal space of water tank body 5; one end of suction column 23 is connected to cleaning tank 41, and the other end is communicated with the internal space of water tank body 5; suction pump 6 sucks air in water tank body 5, so that negative pressure is formed in water tank body 5, and the sewage in cleaning tank 41 is sucked into water tank body 5 from suction column 23.

[0058] It should be noted that the base station main body 1 is also provided with a control module and other basic components required by the cleaning base station, wherein the control module is electrically connected with the suction pump 6 and the air pressure detection module 3 to control the operation of each element, and the specific installation structure and control principle can refer to the prior art, which will not be described here.

[0059] Referring to Figure 3 and Figure 9 , the air pressure detection module 3 comprises an air pressure sensor 33, which is arranged in the base station main body 1 and located between the suction pump 6 and the suction column 22 to detect the air pressure in real time during suction, i.e. the air pressure sensor 33 is arranged in the suction air path of the suction pump 6. The floating element 31 is arranged in the positioning column 24, and when the water level in the water tank body 5 rises, the floating element 31 will float upwards, and in this embodiment, the floating element 31 is provided with a soft rubber 32 towards the top end side of the positioning column 24, when the water level rises to a predetermined value, the soft rubber 32 will block the positioning column 24, so that the suction pump 6 cannot continue to suck air in the water tank body 5, at this time the air pressure increases, when the air pressure detected by the air pressure sensor 33 reaches a predetermined value, an alarm is sent, and the base station main body 1 receives the full signal to stop the suction operation of the suction pump 6.

[0060] Referring to Figures 3 to 9 In the present embodiment, when the air pump 6 pumps the air out of the air column 22, the air inside the water tank body 5 enters the positioning column 24 through the air gap 241, enters the connecting pipe 221 through the air hole 2221, and then enters the air column 22 through the connecting pipe 221 and is subsequently discharged out of the water tank body 5. After a negative pressure is formed inside the water tank body 5, the sewage in the cleaning tank 41 enters the water tank body 5 from the suction column 23, and the floating member 31 floats upwards as the water level in the water tank body 5 rises. When the floating member 31 floats to a predetermined high position, the soft rubber 32 abuts against the air hole 2221. Under the pumping action of the air pump 6, the soft rubber 32 tightly adheres to the air hole 2221, thereby blocking the air hole 2221. At this time, if the air pump 6 continues to pump, the air pressure in the air pumping passage will increase. When the air pressure reaches a predetermined high value of the air pressure sensor 33, the air pressure sensor 33 sends a full signal. At this time, the base station body 1 controls the air pump 6 to stop working.

[0061] Further, a voice broadcast element can also be arranged on the base station body 1. When the base station body 1 receives the full signal, the voice broadcast element sends an audible prompt to prompt the user that the water tank body 5 is full and that sewage discharge is required.

[0062] Referring to Figure 3 、 Figure 4 、 Figure 7 and Figure 8 The base station body 1 is provided with a mounting seat 11 for mounting the water tank body 5. The mounting seat 11 is provided with a mounting groove 111, and the mounting member 2016 is mounted in the mounting groove 111. The bottom of the mounting groove 111 is provided with an air pumping connector 113 and a sewage pumping connector 112 which are arranged one by one corresponding to the air hole 213 and the sewage hole 214. During installation, the air pumping connector 113 extends into the air hole 213 and communicates with the air hole 213, and the sewage pumping connector 112 extends into the sewage hole 214 and communicates with the sewage hole 214. The sewage pumping connector 112 is connected to the cleaning tank 41. In the present embodiment, the sewage pumping connector 112 is connected to the cleaning tank 41 through a water pipe (not shown in the figure). A sewage pumping passage is formed between the cleaning tank 41, the water pipe, the sewage pumping connector 112, the sewage hole 214, and the suction column 23. The air pumping connector 113 is connected to the air pump 6. In the present embodiment, the air pump 6 is connected to the air pumping connector 113 through an air pipe (not shown in the figure). An air pumping passage is formed between the air pump 6, the air pipe, the air pumping connector 113, the air hole 213, and the air column 22.

[0063] Further, in order to ensure the connection sealing between the sewage hole 214 and the sewage pumping connector 112 and between the air hole 213 and the air pumping connector 113, a tower-shaped sealing ring 27 is sleeved on the air pumping connector 113 and the sewage pumping connector 112.

[0064] Further, the bottom wall of the installation groove 111 is provided with an air outlet joint 114, which is located in the installation groove 111 and connected with the air outlet end of the air pump 6. A displacement groove 215 is formed in the base plate 21, and the air outlet joint 114 can extend into the displacement groove 215. When the water tank body 5 is installed, the air outlet joint 114 is aligned with the displacement groove 215, thereby positioning the installation of the water tank body 5, so as to ensure that the air outlet joint 113 and the air outlet hole 213, and the air exhaust joint 112 and the air exhaust hole 214 can be one-to-one corresponding when the water tank body 5 is installed on the base body 1. The gas extracted by the air pump 6 is discharged from the air outlet joint 114 into the installation groove 111, and then discharged to the outside of the base body 1.

[0065] Further, the bottom wall of the installation groove 111 is provided with an air outlet joint 114, which is located in the installation groove 111 and connected with the air outlet end of the air pump 6. A displacement groove 215 is formed in the base plate 21, and the air outlet joint 114 can extend into the displacement groove 215. When the water tank body 5 is installed, the air outlet joint 114 is aligned with the displacement groove 215, thereby positioning the installation of the water tank body 5, so as to ensure that the air outlet joint 113 and the air outlet hole 213, and the air exhaust joint 112 and the air exhaust hole 214 can be one-to-one corresponding when the water tank body 5 is installed on the base body 1. The gas extracted by the air pump 6 is discharged from the air outlet joint 114 into the installation groove 111, and then discharged to the outside of the base body 1.

[0066] The above is a specific description of the preferred embodiment of the present application, but the present application is not limited to the above-mentioned embodiments. Those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application. These equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A negative pressure suction module, characterized by: The negative pressure suction module comprises a mounting piece, an air extraction column, a sewage suction column and a floating piece; the mounting piece is used for mounting the negative pressure suction module to the bottom of a water tank; the air extraction column is arranged on the mounting piece and is used for connecting the inside of the water tank and an air source; the sewage suction column is arranged on the mounting piece and is used for connecting the inside of the water tank and a space where liquid to be sucked is located; and the floating piece can change with the water level in the inside of the water tank and can block the air extraction column.

2. The negative pressure suction module of claim 1, wherein: The negative pressure suction module further comprises a positioning column arranged on the mounting piece, the air extraction column is connected to the positioning column, and a gas permeation gap is arranged on the side wall of the positioning column; and the floating piece is arranged in the positioning column.

3. A negative pressure suction module according to claim 2, characterized in that: The top end of the air extraction column is provided with a connecting pipe, the connecting pipe is connected with a connecting head, the connecting head is arranged on the top end of the positioning column, and a gas permeation hole is arranged on the connecting head and is connected with the connecting pipe. The floating piece can change with the water level in the inside of the water tank and can block the gas permeation hole.

4. The negative pressure suction module of claim 1, wherein: A limiting column is further arranged on the mounting piece, a sewage discharge pipe is connected to the top end of the sewage suction column, a one-way valve is connected to the sewage discharge pipe, the one-way valve is connected to the limiting column, and a water discharge gap is arranged on the limiting column from top to bottom.

5. A water tank characterized by: The negative pressure suction module comprises a mounting piece, an air extraction column, a sewage suction column and a floating piece; the mounting piece is used for mounting the negative pressure suction module to the bottom of a water tank; the air extraction column is arranged on the mounting piece and is used for connecting the inside of the water tank and an air source; the sewage suction column is arranged on the mounting piece and is used for connecting the inside of the water tank and a space where liquid to be sucked is located; and the floating piece can change with the water level in the inside of the water tank and can block the air extraction column.

6. A water tank as claimed in claim 5, wherein: The water tank body is provided with a connecting part, the connecting part is arranged protruding from the mounting hole, the mounting piece comprises a bottom plate and a threaded sleeve, the threaded sleeve is sleeved on the bottom plate, the air extraction column, the sewage suction column and the positioning column are arranged on the bottom plate, a sewage suction hole and an air extraction hole are arranged on the bottom plate, the air extraction column is connected to the air extraction hole, the sewage suction column is connected to the sewage suction hole, and the threaded sleeve is threadedly connected to the connecting part.

7. A water tank as claimed in claim 6, characterized in that: The bottom plate is provided with a flange, the flange is clamped in the mounting hole, the inside of the connecting part is provided with a positioning convex rib, a positioning groove is arranged on the flange and is matched with the positioning convex rib.

8. A cleaning base station characterized by: The water tank comprises a base body and a base, the water tank body is arranged on the base body, an air extraction pump is arranged on the base body and is connected to the air extraction column, a cleaning tank is arranged on the base and is connected to the sewage suction column, an air pressure detection module is arranged on the base body and is electrically connected to the base body, and the air pressure detection module is used for detecting the air pressure of the air extraction pump.

9. A cleaning base station according to claim 8, wherein: The base body is provided with a mounting seat for mounting the water tank, the mounting seat is provided with a mounting groove, the bottom of the mounting groove is provided with an air extraction joint and a sewage suction joint, the mounting piece is arranged in the mounting groove, the air extraction joint extends into the air extraction hole and is connected thereto, the sewage suction joint extends into the sewage suction hole, the air extraction joint is connected to the air extraction pump, and the sewage suction joint is connected to the cleaning tank.

10. A cleaning base station according to claim 9, wherein: The mounting seat is provided with an air outlet joint, the air outlet joint is located in the mounting groove, the air outlet joint is connected with the air outlet end of the air pump, the mounting piece is provided with a clearance groove, and the air outlet joint can extend into the clearance groove; The bottom groove wall of the mounting groove is provided with a drain hole, and the drain hole is connected to the cleaning tank.

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